Question

Which expression is equivalent to a^4 ⋅ b^2 ⋅ a^‐4 ⋅ b^4?

Answer 1

Varibles do NOT matter. So, we're going to want to find an answer that has either a change of a varible, or the same answer, of course. Therefore, answer is (the last option).

Answer: (b^4)

I hope this helps you!